English model paper solution

An acid turns blue litmus paper or solution ________

Model test paper

In a hostel 60% of the students read Hindi news paper, 40% read English news paper and 20% read both Hindi and English news papers. A student is selected at random. (a) Find the probability that she reads neither Hindi nor English news papers. (b) If she reads Hindi news paper, find the probability that she reads English news paper. (c) If she reads English news paper, find the probability that she reads Hindi news paper.

In a certain examination , the number of candidates who appeared in the examination is 1000 out of which 650 appeared in English and 200 appeared in both English and Hindi . Find The number of candidates who offered paper in Hindi (ii) The number of candidates who offered paper in English only.

Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is:

A coloured solution known to contain two metal ions, was treated with excedss cold sodium hydroxide solution. When filtered a whitish solid, slowly changing to brown, was retained on the filter paper and a colourless solution collected as the filtrate. dropwise addition of hydrochloric acid to the filtrate produced a white ppt. which dissolved in excess acid. treatment of the residue on filter paper with a solution of strong oxidier produced a reddishh-violet solution.. indicate any pairs of ions:

NEET 2021 physics paper solution

Bohr Model

In a hostel 60% of the students read Hindi news paper, 40% read English newspaper and 20% read both Hindi and English newspapers. A student is selected at random.Find the probability that she reads neither Hindi nor English news paper ?

A student prepared solutions of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since both the solutions are colourless how will she distinguish between the two ?